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2005年农民反映,许多玉米品种如:农大108、郑单958、中单306、蠡玉16、登海系列等都有不同程度地发生空秆、秃尖、穗分枝的现象。经测定这些品种的种子纯度、净度、发芽率、水分全部符合国家规定的标准,生长期间也未发现严重的混杂现象,而且这些品种在廊坊已推广种植多年,前些年生长正常,产量也较高,未发现异常。我们组织有关专家进行了实地调查,结果表明:凡发生果穗分枝的地块都曾在7～8月份遭受大风、大雨,造成倒伏和涝害;空秆、缺粒、秃尖等在许多品种上都有不同程度的发生。
In 2005, farmers reflected that many maize varieties such as Nongda 108, Zhengdan 958, Zhongdan 306, Yuyu 16 and Denghai series all had empty stalks, bald tips and spike branches to varying degrees. The seed purity, clarity, germination rate and water content of these varieties were determined to meet the national standards. No serious mixed phenomenon was observed during the growth period. These varieties have been planted for many years in Langfang, grew normally in previous years, High, no abnormalities found. We organized relevant experts to conduct a field survey. The results showed that all the plots that had ear branches had suffered heavy winds and heavy rains in July and August, causing lodging and waterlogging. Empty stalks, missing grains, There are different levels of occurrence.